Valve seating and aligning tool



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I VALVE SEATING AND ALIGNING TOOL v Filed Sept.' 9. 1926 :5 Sheets-Sheet2 arch Y o. G. SIMMONS VALVE SEATING AND A'LIGNING TOOL Y v Filed Sept.9. 1926 s Sheets-Sheet s INVENTOR.

Patented Mar, 15, 1 927 UNITED STATES "PATENT OFFICE.

OLIVER G. SIMMONS, OF LAKEWOOD, OHIO, ASSIGNOR TO THE NATIONAL TOOL COM-PANY, OF CLEVELAND, OHIO.

VALVE SEATING AND ALIGNING TOOL. I

Application filed September 9, 1926. Serial No. 184,492.

My invention relates to improved means for reaming the valve stem holesand valve seat in alignment therewith in the cylinder blocks or cylinderheads of internal combus tion engines. I

The main object of the invention resides in the means provided forguiding the valve seat reaming cutter in perfect alignment with thevalve stem reamer. 7

Another object of theinvention is to pro-- vide a valve stem reamer, oftool steel, preferably high speed steel, and fixedly secure it to a bodyportion of less expensive low carbon machine steel;

A further object of the invention is to pro vide the aligning portion inthe form of a port cutter and the 'chamfering cutter, detachably securedto the body portion, to re move excess metal from the valve seatsurface, adapting a valve seating cutter in a subsequent opgration to bedetachably secured to the the valve seat.

A .still further object of this invention is to provide a pin detachablysecured to the body portion, adapting this valve seating and aligningtool to be manually operated to recondition cylinder blocks and cylinderheads in service stations.

Heretofore in valve seating .tools of this character it has been thepractice to provide a valve stem reamer and a valve seating cutter withno special means for aligning the valve seating cutter with the valvestem reamer, with a result that when a cylinder.

block or cylinder head was reconditioned in a service station, by amanually operated tool of the character referred to, the, valve seatingreamer was invariably sprung and produced an elongated valve seat withconsequent leakage from the combustion chamher and a consequentreduction of power due to the inefficient operation of the motor.

The valve port aligning cutter of the pres ent invention, therefore,serves as a guide for the valve cutter, and a valve seat reconditionedby the manually operated tool of the present invention, producesconcentric valve seats and a consequent eflicient operation of themotor, since no gases during the combustionperiod are permitted toescape from the cylinder. a

With the above and other objects in view the invention comprises broadlythe valve aligning feature, obtained by the structure dy portionadapted.- to ream illustrated in the accompanying drawings hereinafterdescribed and particularly set forth in the appended claim, togetherwith .and a valve chamfering cutter detached therefrom.

Fig. 2, is a view in elevation of the valve 1 seating cutter. v,

V Fig. 3, is a bottom view of the valve seat-. ing cutter shown in Fig.2. In this view the teeth of the valve reamer are clearly seen to beunevenly spaced.

Fig. 4, is a view in elevation of the chamfering cutter.

Fig. 5, is a bottom view showing the teeth of the chamfering cutter, ofFig. 4.

Fig. 6,. is a fragmentary portion of the valve aligning tool showing thevalve stem reamer, the port aligning cutter and the valve seat cutter. v

Fig. 7 is an end view of Fig.- 6.

Fig. 8, is similar to Fig. 6, except in this view the chamfering cutterhas been substituted for the valve seating cutter.

Fig. 9, is an end view of Fig. 8. f

Fig. 10, is a view in elevation, partly in section, of the valve seatingand aligning tool as it appears when inserted in a cylinder block, afterall operations have been completed to ream. the valve stem hole andfinish ream the valve seat. The aligning feature of this manuallyoperated tool is shown in the form of a port cutter and clearlyillustrates its aligning feature, maintainingconcentricity between thevalve-seat reamer and the .valve stem reamer shown in the fragmentarysection of the valve seat of the cyllnder block. 7

Fig. '11 is a fragmentary section of the valve seat of the cylinderblock illustrating the form roduced by the chamfering cutter and its reation to the valve seat of the cylin der block.

Fig.v 12 is a fragmentary sectional view of the valve seat of thecylinder .block as it would appear after the chamfering cutter hadoperated and cut away the valve seat. The body portion. 1, is providedwith the detachablestem 2, shown. The lower 'poring the valve stemreamer. This is shown tion 3 of the body portion 1 is tapered and isprovided with detachable pins 4-.- and 5 for a purpose to be laterdescribed. In the tapered portion 3 of the body 1, a hole' 6 isprovided, adapting an end portion of the reamer 7 to be firmly securedto said body portion 1, for example, by shrinking the end portion ofreamer 7 into the hole in tapered portion 3; thus the body portion 1 maybe made of inexpensive low carbon machine steel and the reamer portion 7may be made of high speed steel or of high carbon tool steel.

The port cutter member 8 is provided with a tapered hole 9 and a milledslot 10, adapting said port cutter to fit the tapered end 3 and the pin5; the pin 5 'fitting into the milled slot 10, so that as the stem .2 isgrasped by the operator to rotate same the port cutter'member 8 will berotated with it. v The port cutter 8 is provided with teeth 11,chamfered slightly on the front edge, as shown at 12, to provide acutting edge. The body portion proper, however, is concentrically groundwith the taper hole 9, thus as the edge 12 is rotated in the directionof the arrow 13 and a slight pressure'exerted in the direction of thearrow 14, the port cutter 8 will remove metal in the upper part of thecylinder block and the concentrically ground feature of the body portionof said cutter will serve to guide. it truly in a concentric path, withrespect to the teeth 15 of the valve stem reamer 7.

Referring to Fig. 4, the chamferin'g cuttei 16 is provided with theteeth 17, tapered hole 18 and milled slot 19, adapting it to bedetachably secured to the tapered portion 3 of the body portion 1. Toplace this chamfering tool on the body portion 3, it is necessarytoremove the port cutter 8 and the pin 5. These are easily removed bymeans of a slight blow from a wooden mallet, and the chamfering cutterinserted, the milled slot 19 being lined up and adapted to receive thepin 4, after which the pin 5 is inserted and the port cutter placed inposition shown.

The valve seat cutter 20 is shown in Fig. 2. This is provided withmilled slot 21, tapered hole 22, adapting this cutter to fit the taperedportion 3, and pin 4 in a manner similar to chamfering cutter 16. Theteeth 23 of the valve cutter 20 are unevenly spaced as shown in Fig. 3,so that as the valve seat cutter 20 is rotated, the teeth being unevenlyspaced, chatter will not result and therefore insures a smooth seat forthe valve.

The lower portion 24,- of the valve stem reamer 7 indicates that theteeth are not milled clear to the end of same. This lower portion 24: isground concentric a few thousandths smaller in diameter than thediameter of the portion of the teeth 15, so'that the stem-24 will serveas a guide when enterin Figs' 1 and 8. In Figs. 6 and 10, however, theteeth 15 are "milled-clear to the end 25 of the valve stem reamer 7.This is done to provide, chip clearance-when an oversize valve is to beused and when the reamer is designed this way, .015 inch of metal isusually removed for the reason that oversize valve stems are madesubstantially .015 inch over the size of the valve stem originallyfurnished with the motor and if the teeth were not cut clear throughto'the end 25, thechips would pack up and'niake the tool inoperative.Figs. 6 and 10, therefore, illustrate the tool when adapted to be usedfor oversize valves, whereas Figs. 1 and 8 illustrate the reamer for usewith standard valve stem as furnished originally with the motor.

F ig. 6 shows the set-up of the valve cutter 20 in place, whereas Fi 8shows the assembly of the chamfering cutter 16, the method ofapplication having been previously described. 1

In the use of the tool the following procedure is followed:v

Chamfering'cutter I6 is placed as shown in Fig. 8. The port cutter 8 inposition, the operator inserts the reamer portion 7 in the hole of thevalve stem portion 26,

as previously described exerting slight pressure in the direction of thearrow 14. This will cause the reamer to workits way into the valve holeuntil port cutter 8 reaches see Fig. 10, and begins to rotate the toolthe point 27, Fig. 12, when it will begin to cut and remove metal fromthe surface 28 of the port hole. Theport cutter 8 being concentricallyground will seat itself as shown in Fig. 10, and will, therefore, act

as a guide to maintain alignment for the chamfering cutter 16 whichchamfers the surface 29 as shown in Fig. 12. After this operation thevalve seat cutter 20 is inserted, as shown in Fig. 6, and the tool againentered into the valve stem hole, as shown in Fig. 10, and operated aspreviously described to cut the valve seat portion 30, as

shown in Fig. 11. It is important that the width W, Fig. 11, of thevalve seat be substan-tially the same in all cylinders and this is madepossible by virtue of the chamferin cutter 16 previously described.

l laving thus described my invention, I claim:

In a valve seating tool, body portion provided with a valve stem reamercutter, a

detachable chamfering cutter and a vdetachable port cutter interposedbetween the cutters aforesaid, said port cutter beingconcentrically'ground and serving as a guide to maintain alignmentbetween said chainfering cutter and said valve stem reamer cutter.

Signed this 7th day of September, 1926.

OLIVER G. SIMMONS.

